I recently had some fun playing with keyboard mapping. There's already a "reverse keyboard" option, and I was wondering about adding a "negative harmony" option, with the option to choose a note around which to mirror. Shouldn't be specially difficult to add from programming point of view, and I would find it very interesting being able to hear my (and other) pieces in negative harmony versions.(Edit: I just realized I can probably do it already by editing the degree mapping - sorry, I need to learn to think before posting )
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